Urkel

What Urkel Actually Is

Urkel is a lightweight static site generator and content pipeline tool written in Go. It reads a directory of markdown files, applies a template layer, and spits out a fully rendered website with minimal configuration. It is not particularly famous, which is partly why people who find it tend to stick with it. The main draw is speed and simplicity. My first project with Urkel involved about 400 blog posts and a handful of template files. Build time came in at roughly 8 seconds on a 2021 MacBook Air. Compare that to heavier tools that crawl through the same content for 45 seconds to two minutes, and the difference is noticeable when you are iterating frequently. Another reason is the plugin structure. Urkel uses a simple hook system based on Go interfaces. You write a small function, register it, and the pipeline runs it at whatever stage you need. I built a custom feed sanitizer this way that strips out stray HTML tags from user-submitted drafts before they hit the publish step. Took about 30 lines of code.

How to set it up and get running

Install it first. The project has a GitHub repository and publishes releases. You can grab the binary directly or install via a package manager if one exists for your OS. After installation, run the init command in your target directory. It creates a config file, a content folder, and a basic layout template. Edit the config file. The default format is YAML. You set the source directory, the output directory, the theme path, and any metadata defaults like author name or site title. Then drop your markdown files into the content folder using the expected naming convention. Urkel expects front matter at the top of each file for things like date, title, and taxonomy tags. Run the build command. It compiles everything and writes the output folder. Serve it locally with the built-in server flag to preview. That is the entire workflow at the surface level.

Common pitfalls and how to avoid them

One thing that trips people up is relative link handling inside markdown. Urkel does not rewrite links automatically the way some larger generators do. If you link to another page using a relative path, it works fine as long as your folder structure stays flat. Once you start nesting content directories, broken links appear silently because the generator does not warn you. I spent a morning tracking down a dead link that turned out to be a depth mismatch between my content tree and the output tree. The fix was to use absolute paths from the site root and enable the link validation flag in the config. Another issue is template caching. Urkel caches compiled templates during a build, which speeds things up but can leave stale output if you edit a template and forget to clear the cache. I hit this once when changing a sidebar layout and wondering why the site still showed the old version. Running a cache clear flag before rebuild fixed it. I usually just add a tiny alias script that clears cache and builds in one command.

A note on performance and limits

Urkel works well for small to medium sites. I have seen people push it to sites with over a thousand pages, and it still handles the build reasonably fast. The bottleneck tends to shift from the generator itself to asset processing. If you are running image optimization or CSS minification as part of your pipeline, those external steps usually dominate total build time, not Urkel. The plugin system is powerful but not deeply documented. You will read the source code more than you will read official guides, which is fine if you are comfortable with Go. If you are not, the learning curve is steeper than tools that abstract everything away. There are community plugins available, but coverage is patchy. Some hooks simply do not have ready-made solutions, and you end up writing them yourself. If your project requires heavy dynamic rendering, server-side content, or a complex CMS integration, Urkel is not the right choice. It is a static generator. It does exactly what static generators do, fairly well, without unnecessary baggage.

Where to get it

The source and releases live on GitHub under the Urkel project name. Check the repository for the latest build instructions, the README, and the issues tab if you run into edge cases. The maintainers are active enough that closed issues often contain the exact workaround you need.